French historian St.
Yves d'Alveydre said the Vattanian language was revealed to him in 1885
by a race of beings living in the paradise of Agartha. His search for
knowledge and a technique of astral travel led him to these folks, who
he said lived in 'perfect harmony and had the ability to talk and hear
all human languages simultaneously'.
You'd think this alone would drive them nuts.

He said they also enjoyed "all the trimmings of
Victorian high technology".
Which leaves me very unimpressed with the lot of them.